package reflect;

import java.util.Scanner;
//通过反射机制实例化对象
public class ReflectDemo2 {
    public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException {
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入类名:");
        String className = scan.nextLine();
        Class cls = Class.forName(className);
        /*
            通过newInstance()可以进行实例化
            假设cls为String对象,则newInstance()的结果
                相当于String s = new String();
            假设cls为ArrayList对象,则newInstance()的结果
            相当于ArrayList list = new ArrayList();
         */

        Object obj = cls.newInstance();//只能使用无参构造器实例化!
        System.out.println(obj);
    }
}
